GENERAL DESCRIPTION

The AD7865 is a fast, low power, four-channel simultaneous sampling 14-bit A/D converter that operates from a single 5 V supply. The part contains a 2.4 µs successive approximation ADC, four track/hold amplifiers, 2.5 V reference, on-chip clock oscillator, signal conditioning circuitry and a high speed parallel interface. The input signals on four channels are sampled simultaneously thus preserving the relative phase information of the signals on the four analog inputs. The part accepts analog input ranges of ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V and 0 V to 5 V.

FEATURES

Fast (2.4 μs) 14-Bit ADC

Four Simultaneously Sampled Inputs

Four Track/Hold Amplifiers

0.35 μs Track/Hold Acquisition Time

2.4 μs Conversion Time per Channel

HW/SW Select of Channel Sequence for Conversion

Single Supply Operation

Selection of Input Ranges: ±10 V, ±5 V and ±2.5 V,

0 V to +5 V and 0 V to +2.5 V

High Speed Parallel Interface Which Also Allows

Interfacing to 3 V Processors

Low Power, 115 mW Typ

Power Saving Mode, 15 μW Typ

Overvoltage Protection on Analog Inputs

APPLICATIONS

AC Motor Control

Uninterruptible Power Supplies

Industrial Power Meters/Monitors

Data Acquisition Systems

Communications

AD7865属于集成电路（IC） > 模数转换器（ADC）。亚德诺半导体技术有限公司制造生产的AD7865模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。